The MVC Store Front project was written by Rob Conery and he blogs about it here:
http://blog.wekeroad.com/category/mvc-storefront
You ll note here that it was re-branded as "Kona", although some people referred to Kona as "MVC Store Front 2.0". After this, the sample application was moved on as part of an NHibernate screen cast...
http://tekpub.com/preview/nhibernate
And some sources say that the Orchard Project assimilated the MVC Store Front sample as a component of a much larger content management system, which as you know is located here...
http://www.orchardproject.net/
http://orchard.codeplex.com/
Although I can t find any documentation on the Orchard Project website that confirms that it contains the MVC Store Front or a derivative thereof.
The main reason for losing the trail on this project is that Rob Conery left Microsoft while making the original MVC Store Front screen casts, so this is where the historical black-spot come from in this series.